infinitepush: increase test timeout and add logging

Summary:
Tests failed on mac. My guess is that timeout is too low.
Let's increase it to 10 seconds (it's fine because we want wait for 10 sec
if debugbackup finishes faster).

Also let's add logging

Test Plan: Run `test-infinitepush-*`

Reviewers: #sourcecontrol

Differential Revision: https://phabricator.intern.facebook.com/D4213330

Tasks: 12479677

infinitepush/__init__.py

@@ -50,6 +50,9 @@
 
     # Server-side option
     loglevel = DEBUG
+
+    # Client-side option
+    debugbackuplog = FILE
 """
 
 from __future__ import absolute_import
@@ -630,7 +633,11 @@ def backup(ui, repo, dest=None, **opts):
     """
 
     if opts.get('background'):
-        runshellcommand('hg debugbackup', os.environ)
+        background_cmd = 'hg debugbackup'
+        logfile = ui.config('infinitepush', 'debugbackuplog')
+        if logfile:
+            background_cmd = background_cmd + ' &> ' + logfile
+        runshellcommand(background_cmd, os.environ)
         return 0
     backuptipfile = 'infinitepushbackuptip'
     backuptip = repo.svfs.tryread(backuptipfile)

tests/test-infinitepush-backup.t

@@ -132,12 +132,18 @@ Backup in background
   6 (no-eol)
   $ mkcommit newcommit
   $ tip=`hg log -r tip -T '{rev}'`
-  $ hg debugbackup --background
+  $ hg --config infinitepush.debugbackuplog="$TESTTMP/logfile" debugbackup --background
   >>> from time import sleep
-  >>> for i in range(5):
+  >>> for i in range(100):
   ...   sleep(0.1)
   ...   backuptip = int(open('.hg/store/infinitepushbackuptip').read())
   ...   if backuptip == 7:
   ...     break
+  $ cat $TESTTMP/logfile
+  pushing to ssh://user@dummy/repo
+  searching for changes
+  remote: pushing 2 commits:
+  remote:     667453c0787e  newhead2
+  remote:     773a3ba2e7c2  newcommit
   $ cat .hg/store/infinitepushbackuptip
   7 (no-eol)